// Copyright (c) .NET Foundation and Contributors (https://dotnetfoundation.org/ & https://stride3d.net) and Silicon Studio Corp. (https://www.siliconstudio.co.jp)
// Distributed under the MIT license. See the LICENSE.md file in the project root for more information.
//
// -----------------------------------------------------------------------------
// Original code from SlimMath project. http://code.google.com/p/slimmath/
// Greetings to SlimDX Group. Original code published with the following license:
// -----------------------------------------------------------------------------
/*
* Copyright (c) 2007-2011 SlimDX Group
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

using System.Diagnostics.CodeAnalysis;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace Stride.Core.Mathematics;

/// <summary>
/// Represents a color in the form of rgb.
/// </summary>
[DataContract("Color3")]
[DataStyle(DataStyle.Compact)]
[StructLayout(LayoutKind.Sequential, Pack = 4)]
public struct Color3 : IEquatable<Color3>, ISpanFormattable
{
    /// <summary>
    /// The red component of the color.
    /// </summary>
    [DataMember(0)]
    public float R;

    /// <summary>
    /// The green component of the color.
    /// </summary>
    [DataMember(1)]
    public float G;

    /// <summary>
    /// The blue component of the color.
    /// </summary>
    [DataMember(2)]
    public float B;

    /// <summary>
    /// Initializes a new instance of the <see cref="Color3"/> struct.
    /// </summary>
    /// <param name="value">The value that will be assigned to all components.</param>
    public Color3(float value)
    {
        R = value;
        G = value;
        B = value;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="Color3"/> struct.
    /// </summary>
    /// <param name="red">The red component of the color.</param>
    /// <param name="green">The green component of the color.</param>
    /// <param name="blue">The blue component of the color.</param>
    public Color3(float red, float green, float blue)
    {
        R = red;
        G = green;
        B = blue;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="Color3"/> struct.
    /// </summary>
    /// <param name="value">The red, green, and blue components of the color.</param>
    public Color3(Vector3 value)
    {
        R = value.X;
        G = value.Y;
        B = value.Z;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="Color3"/> struct.
    /// </summary>
    /// <param name="rgb">A packed integer containing all three color components.
    /// The alpha component is ignored.</param>
    public Color3(int rgb)
    {
        B = ((rgb >> 16) & 255) / 255.0f;
        G = ((rgb >> 8) & 255) / 255.0f;
        R = (rgb & 255) / 255.0f;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="Color3"/> struct.
    /// </summary>
    /// <param name="rgb">A packed unsigned integer containing all three color components.
    /// The alpha component is ignored.</param>
    public Color3(uint rgb)
    {
        B = ((rgb >> 16) & 255) / 255.0f;
        G = ((rgb >> 8) & 255) / 255.0f;
        R = (rgb & 255) / 255.0f;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="Color3"/> struct.
    /// </summary>
    /// <param name="values">The values to assign to the red, green, and blue components of the color. This must be an array with three elements.</param>
    /// <exception cref="ArgumentNullException">Thrown when <paramref name="values"/> is <c>null</c>.</exception>
    /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="values"/> contains more or less than four elements.</exception>
    public Color3(float[] values)
    {
        ArgumentNullException.ThrowIfNull(values);
        if (values.Length != 3)
            throw new ArgumentOutOfRangeException(nameof(values), "There must be three and only three input values for Color3.");

        R = values[0];
        G = values[1];
        B = values[2];
    }

    /// <summary>
    /// Gets or sets the component at the specified index.
    /// </summary>
    /// <value>The value of the red, green, or blue component, depending on the index.</value>
    /// <param name="index">The index of the component to access. Use 0 for the red component, 1 for the green component, and 2 for the blue component.</param>
    /// <returns>The value of the component at the specified index.</returns>
    /// <exception cref="System.ArgumentOutOfRangeException">Thrown when the <paramref name="index"/> is out of the range [0, 2].</exception>
    public float this[int index]
    {
        readonly get
        {
            return index switch
            {
                0 => R,
                1 => G,
                2 => B,
                _ => throw new ArgumentOutOfRangeException(nameof(index), "Indices for Color3 run from 0 to 2, inclusive."),
            };
        }

        set
        {
            switch (index)
            {
                case 0: R = value; break;
                case 1: G = value; break;
                case 2: B = value; break;
                default: throw new ArgumentOutOfRangeException(nameof(index), "Indices for Color3 run from 0 to 2, inclusive.");
            }
        }
    }

    /// <summary>
    /// Converts the color into a packed integer.
    /// </summary>
    /// <returns>A packed integer containing all three color components.
    /// The alpha channel is set to 255.</returns>
    public readonly int ToRgb()
    {
        const uint a = 255;
        uint r = (uint)(R * 255.0f);
        uint g = (uint)(G * 255.0f);
        uint b = (uint)(B * 255.0f);

        uint value = r;
        value += g << 8;
        value += b << 16;
        value += a << 24;

        return (int)value;
    }

    /// <summary>
    /// Raises the exponent for each components.
    /// </summary>
    /// <param name="exponent">The exponent.</param>
    public void Pow(float exponent)
    {
        R = MathF.Pow(R, exponent);
        G = MathF.Pow(G, exponent);
        B = MathF.Pow(B, exponent);
    }

    /// <summary>
    /// Converts the color into a three component vector.
    /// </summary>
    /// <returns>A three component vector containing the red, green, and blue components of the color.</returns>
    public readonly Vector3 ToVector3()
    {
        return new Vector3(R, G, B);
    }

    /// <summary>
    /// Creates an array containing the elements of the color.
    /// </summary>
    /// <returns>A three-element array containing the components of the color.</returns>
    public readonly float[] ToArray()
    {
        return [R, G, B];
    }

    /// <summary>
    /// Adds two colors.
    /// </summary>
    /// <param name="left">The first color to add.</param>
    /// <param name="right">The second color to add.</param>
    /// <param name="result">When the method completes, completes the sum of the two colors.</param>
    public static void Add(ref readonly Color3 left, ref readonly Color3 right, out Color3 result)
    {
        result.R = left.R + right.R;
        result.G = left.G + right.G;
        result.B = left.B + right.B;
    }

    /// <summary>
    /// Adds two colors.
    /// </summary>
    /// <param name="left">The first color to add.</param>
    /// <param name="right">The second color to add.</param>
    /// <returns>The sum of the two colors.</returns>
    public static Color3 Add(Color3 left, Color3 right)
    {
        return new Color3(left.R + right.R, left.G + right.G, left.B + right.B);
    }

    /// <summary>
    /// Subtracts two colors.
    /// </summary>
    /// <param name="left">The first color to subtract.</param>
    /// <param name="right">The second color to subtract.</param>
    /// <param name="result">WHen the method completes, contains the difference of the two colors.</param>
    public static void Subtract(ref readonly Color3 left, ref readonly Color3 right, out Color3 result)
    {
        result.R = left.R - right.R;
        result.G = left.G - right.G;
        result.B = left.B - right.B;
    }

    /// <summary>
    /// Subtracts two colors.
    /// </summary>
    /// <param name="left">The first color to subtract.</param>
    /// <param name="right">The second color to subtract</param>
    /// <returns>The difference of the two colors.</returns>
    public static Color3 Subtract(Color3 left, Color3 right)
    {
        return new Color3(left.R - right.R, left.G - right.G, left.B - right.B);
    }

    /// <summary>
    /// Modulates two colors.
    /// </summary>
    /// <param name="left">The first color to modulate.</param>
    /// <param name="right">The second color to modulate.</param>
    /// <param name="result">When the method completes, contains the modulated color.</param>
    public static void Modulate(ref readonly Color3 left, ref readonly Color3 right, out Color3 result)
    {
        result.R = left.R * right.R;
        result.G = left.G * right.G;
        result.B = left.B * right.B;
    }

    /// <summary>
    /// Modulates two colors.
    /// </summary>
    /// <param name="left">The first color to modulate.</param>
    /// <param name="right">The second color to modulate.</param>
    /// <returns>The modulated color.</returns>
    public static Color3 Modulate(Color3 left, Color3 right)
    {
        return new Color3(left.R * right.R, left.G * right.G, left.B * right.B);
    }

    /// <summary>
    /// Scales a color.
    /// </summary>
    /// <param name="value">The color to scale.</param>
    /// <param name="scale">The amount by which to scale.</param>
    /// <param name="result">When the method completes, contains the scaled color.</param>
    public static void Scale(ref readonly Color3 value, float scale, out Color3 result)
    {
        result.R = value.R * scale;
        result.G = value.G * scale;
        result.B = value.B * scale;
    }

    /// <summary>
    /// Scales a color.
    /// </summary>
    /// <param name="value">The color to scale.</param>
    /// <param name="scale">The amount by which to scale.</param>
    /// <returns>The scaled color.</returns>
    public static Color3 Scale(Color3 value, float scale)
    {
        return new Color3(value.R * scale, value.G * scale, value.B * scale);
    }

    /// <summary>
    /// Negates a color.
    /// </summary>
    /// <param name="value">The color to negate.</param>
    /// <param name="result">When the method completes, contains the negated color.</param>
    public static void Negate(ref readonly Color3 value, out Color3 result)
    {
        result.R = 1.0f - value.R;
        result.G = 1.0f - value.G;
        result.B = 1.0f - value.B;
    }

    /// <summary>
    /// Negates a color.
    /// </summary>
    /// <param name="value">The color to negate.</param>
    /// <returns>The negated color.</returns>
    public static Color3 Negate(Color3 value)
    {
        return new Color3(1.0f - value.R, 1.0f - value.G, 1.0f - value.B);
    }

    /// <summary>
    /// Restricts a value to be within a specified range.
    /// </summary>
    /// <param name="value">The value to clamp.</param>
    /// <param name="min">The minimum value.</param>
    /// <param name="max">The maximum value.</param>
    /// <param name="result">When the method completes, contains the clamped value.</param>
    public static void Clamp(ref readonly Color3 value, ref readonly Color3 min, ref readonly Color3 max, out Color3 result)
    {
        float red = value.R;
        red = (red > max.R) ? max.R : red;
        red = (red < min.R) ? min.R : red;

        float green = value.G;
        green = (green > max.G) ? max.G : green;
        green = (green < min.G) ? min.G : green;

        float blue = value.B;
        blue = (blue > max.B) ? max.B : blue;
        blue = (blue < min.B) ? min.B : blue;

        result = new Color3(red, green, blue);
    }

    /// <summary>
    /// Restricts a value to be within a specified range.
    /// </summary>
    /// <param name="value">The value to clamp.</param>
    /// <param name="min">The minimum value.</param>
    /// <param name="max">The maximum value.</param>
    /// <returns>The clamped value.</returns>
    public static Color3 Clamp(Color3 value, Color3 min, Color3 max)
    {
        Clamp(ref value, ref min, ref max, out var result);
        return result;
    }

    /// <summary>
    /// Performs a linear interpolation between two colors.
    /// </summary>
    /// <param name="start">Start color.</param>
    /// <param name="end">End color.</param>
    /// <param name="amount">Value between 0 and 1 indicating the weight of <paramref name="end"/>.</param>
    /// <param name="result">When the method completes, contains the linear interpolation of the two colors.</param>
    /// <remarks>
    /// This method performs the linear interpolation based on the following formula.
    /// <c>start + (end - start) * amount</c>
    /// Passing <paramref name="amount"/> a value of 0 will cause <paramref name="start"/> to be returned; a value of 1 will cause <paramref name="end"/> to be returned.
    /// </remarks>
    public static void Lerp(ref readonly Color3 start, ref readonly Color3 end, float amount, out Color3 result)
    {
        result.R = start.R + (amount * (end.R - start.R));
        result.G = start.G + (amount * (end.G - start.G));
        result.B = start.B + (amount * (end.B - start.B));
    }

    /// <summary>
    /// Performs a linear interpolation between two colors.
    /// </summary>
    /// <param name="start">Start color.</param>
    /// <param name="end">End color.</param>
    /// <param name="amount">Value between 0 and 1 indicating the weight of <paramref name="end"/>.</param>
    /// <returns>The linear interpolation of the two colors.</returns>
    /// <remarks>
    /// This method performs the linear interpolation based on the following formula.
    /// <c>start + (end - start) * amount</c>
    /// Passing <paramref name="amount"/> a value of 0 will cause <paramref name="start"/> to be returned; a value of 1 will cause <paramref name="end"/> to be returned.
    /// </remarks>
    public static Color3 Lerp(Color3 start, Color3 end, float amount)
    {
        return new Color3(
            start.R + (amount * (end.R - start.R)),
            start.G + (amount * (end.G - start.G)),
            start.B + (amount * (end.B - start.B)));
    }

    /// <summary>
    /// Performs a cubic interpolation between two colors.
    /// </summary>
    /// <param name="start">Start color.</param>
    /// <param name="end">End color.</param>
    /// <param name="amount">Value between 0 and 1 indicating the weight of <paramref name="end"/>.</param>
    /// <param name="result">When the method completes, contains the cubic interpolation of the two colors.</param>
    public static void SmoothStep(ref readonly Color3 start, ref readonly Color3 end, float amount, out Color3 result)
    {
        amount = (amount > 1.0f) ? 1.0f : ((amount < 0.0f) ? 0.0f : amount);
        amount = amount * amount * (3.0f - (2.0f * amount));

        result.R = start.R + ((end.R - start.R) * amount);
        result.G = start.G + ((end.G - start.G) * amount);
        result.B = start.B + ((end.B - start.B) * amount);
    }

    /// <summary>
    /// Performs a cubic interpolation between two colors.
    /// </summary>
    /// <param name="start">Start color.</param>
    /// <param name="end">End color.</param>
    /// <param name="amount">Value between 0 and 1 indicating the weight of <paramref name="end"/>.</param>
    /// <returns>The cubic interpolation of the two colors.</returns>
    public static Color3 SmoothStep(Color3 start, Color3 end, float amount)
    {
        amount = (amount > 1.0f) ? 1.0f : ((amount < 0.0f) ? 0.0f : amount);
        amount = amount * amount * (3.0f - (2.0f * amount));

        return new Color3(
            start.R + ((end.R - start.R) * amount),
            start.G + ((end.G - start.G) * amount),
            start.B + ((end.B - start.B) * amount));
    }

    /// <summary>
    /// Returns a color containing the smallest components of the specified colorss.
    /// </summary>
    /// <param name="left">The first source color.</param>
    /// <param name="right">The second source color.</param>
    /// <param name="result">When the method completes, contains an new color composed of the largest components of the source colorss.</param>
    public static void Max(ref readonly Color3 left, ref readonly Color3 right, out Color3 result)
    {
        result.R = (left.R > right.R) ? left.R : right.R;
        result.G = (left.G > right.G) ? left.G : right.G;
        result.B = (left.B > right.B) ? left.B : right.B;
    }

    /// <summary>
    /// Returns a color containing the largest components of the specified colorss.
    /// </summary>
    /// <param name="left">The first source color.</param>
    /// <param name="right">The second source color.</param>
    /// <returns>A color containing the largest components of the source colors.</returns>
    public static Color3 Max(Color3 left, Color3 right)
    {
        Max(ref left, ref right, out var result);
        return result;
    }

    /// <summary>
    /// Returns a color containing the smallest components of the specified colors.
    /// </summary>
    /// <param name="left">The first source color.</param>
    /// <param name="right">The second source color.</param>
    /// <param name="result">When the method completes, contains an new color composed of the smallest components of the source colors.</param>
    public static void Min(ref readonly Color3 left, ref readonly Color3 right, out Color3 result)
    {
        result.R = (left.R < right.R) ? left.R : right.R;
        result.G = (left.G < right.G) ? left.G : right.G;
        result.B = (left.B < right.B) ? left.B : right.B;
    }

    /// <summary>
    /// Returns a color containing the smallest components of the specified colors.
    /// </summary>
    /// <param name="left">The first source color.</param>
    /// <param name="right">The second source color.</param>
    /// <returns>A color containing the smallest components of the source colors.</returns>
    public static Color3 Min(Color3 left, Color3 right)
    {
        Min(ref left, ref right, out var result);
        return result;
    }

    /// <summary>
    /// Adjusts the contrast of a color.
    /// </summary>
    /// <param name="value">The color whose contrast is to be adjusted.</param>
    /// <param name="contrast">The amount by which to adjust the contrast.</param>
    /// <param name="result">When the method completes, contains the adjusted color.</param>
    public static void AdjustContrast(ref readonly Color3 value, float contrast, out Color3 result)
    {
        result.R = 0.5f + (contrast * (value.R - 0.5f));
        result.G = 0.5f + (contrast * (value.G - 0.5f));
        result.B = 0.5f + (contrast * (value.B - 0.5f));
    }

    /// <summary>
    /// Adjusts the contrast of a color.
    /// </summary>
    /// <param name="value">The color whose contrast is to be adjusted.</param>
    /// <param name="contrast">The amount by which to adjust the contrast.</param>
    /// <returns>The adjusted color.</returns>
    public static Color3 AdjustContrast(Color3 value, float contrast)
    {
        return new Color3(
            0.5f + (contrast * (value.R - 0.5f)),
            0.5f + (contrast * (value.G - 0.5f)),
            0.5f + (contrast * (value.B - 0.5f)));
    }

    /// <summary>
    /// Adjusts the saturation of a color.
    /// </summary>
    /// <param name="value">The color whose saturation is to be adjusted.</param>
    /// <param name="saturation">The amount by which to adjust the saturation.</param>
    /// <param name="result">When the method completes, contains the adjusted color.</param>
    public static void AdjustSaturation(ref readonly Color3 value, float saturation, out Color3 result)
    {
        float grey = (value.R * 0.2125f) + (value.G * 0.7154f) + (value.B * 0.0721f);

        result.R = grey + (saturation * (value.R - grey));
        result.G = grey + (saturation * (value.G - grey));
        result.B = grey + (saturation * (value.B - grey));
    }

    /// <summary>
    /// Adjusts the saturation of a color.
    /// </summary>
    /// <param name="value">The color whose saturation is to be adjusted.</param>
    /// <param name="saturation">The amount by which to adjust the saturation.</param>
    /// <returns>The adjusted color.</returns>
    public static Color3 AdjustSaturation(Color3 value, float saturation)
    {
        float grey = (value.R * 0.2125f) + (value.G * 0.7154f) + (value.B * 0.0721f);

        return new Color3(
            grey + (saturation * (value.R - grey)),
            grey + (saturation * (value.G - grey)),
            grey + (saturation * (value.B - grey)));
    }

    /// <summary>
    /// Converts this color from linear space to sRGB space.
    /// </summary>
    /// <returns>A color3 in sRGB space.</returns>
    public readonly Color3 ToSRgb()
    {
        return new Color3(MathUtil.LinearToSRgb(R), MathUtil.LinearToSRgb(G), MathUtil.LinearToSRgb(B));
    }

    /// <summary>
    /// Converts this color from sRGB space to linear space.
    /// </summary>
    /// <returns>Color3.</returns>
    public readonly Color3 ToLinear()
    {
        return new Color3(MathUtil.SRgbToLinear(R), MathUtil.SRgbToLinear(G), MathUtil.SRgbToLinear(B));
    }

    /// <summary>
    /// Adds two colors.
    /// </summary>
    /// <param name="left">The first color to add.</param>
    /// <param name="right">The second color to add.</param>
    /// <returns>The sum of the two colors.</returns>
    public static Color3 operator +(Color3 left, Color3 right)
    {
        return new Color3(left.R + right.R, left.G + right.G, left.B + right.B);
    }

    /// <summary>
    /// Assert a color (return it unchanged).
    /// </summary>
    /// <param name="value">The color to assert (unchange).</param>
    /// <returns>The asserted (unchanged) color.</returns>
    public static Color3 operator +(Color3 value)
    {
        return value;
    }

    /// <summary>
    /// Subtracts two colors.
    /// </summary>
    /// <param name="left">The first color to subtract.</param>
    /// <param name="right">The second color to subtract.</param>
    /// <returns>The difference of the two colors.</returns>
    public static Color3 operator -(Color3 left, Color3 right)
    {
        return new Color3(left.R - right.R, left.G - right.G, left.B - right.B);
    }

    /// <summary>
    /// Negates a color.
    /// </summary>
    /// <param name="value">The color to negate.</param>
    /// <returns>A negated color.</returns>
    public static Color3 operator -(Color3 value)
    {
        return new Color3(-value.R, -value.G, -value.B);
    }

    /// <summary>
    /// Scales a color.
    /// </summary>
    /// <param name="scale">The factor by which to scale the color.</param>
    /// <param name="value">The color to scale.</param>
    /// <returns>The scaled color.</returns>
    public static Color3 operator *(float scale, Color3 value)
    {
        return new Color3(value.R * scale, value.G * scale, value.B * scale);
    }

    /// <summary>
    /// Scales a color.
    /// </summary>
    /// <param name="value">The factor by which to scale the color.</param>
    /// <param name="scale">The color to scale.</param>
    /// <returns>The scaled color.</returns>
    public static Color3 operator *(Color3 value, float scale)
    {
        return new Color3(value.R * scale, value.G * scale, value.B * scale);
    }

    /// <summary>
    /// Modulates two colors.
    /// </summary>
    /// <param name="left">The first color to modulate.</param>
    /// <param name="right">The second color to modulate.</param>
    /// <returns>The modulated color.</returns>
    public static Color3 operator *(Color3 left, Color3 right)
    {
        return new Color3(left.R * right.R, left.G * right.G, left.B * right.B);
    }

    /// <summary>
    /// Tests for equality between two objects.
    /// </summary>
    /// <param name="left">The first value to compare.</param>
    /// <param name="right">The second value to compare.</param>
    /// <returns><c>true</c> if <paramref name="left"/> has the same value as <paramref name="right"/>; otherwise, <c>false</c>.</returns>
    public static bool operator ==(Color3 left, Color3 right)
    {
        return left.Equals(right);
    }

    /// <summary>
    /// Tests for inequality between two objects.
    /// </summary>
    /// <param name="left">The first value to compare.</param>
    /// <param name="right">The second value to compare.</param>
    /// <returns><c>true</c> if <paramref name="left"/> has a different value than <paramref name="right"/>; otherwise, <c>false</c>.</returns>
    public static bool operator !=(Color3 left, Color3 right)
    {
        return !left.Equals(right);
    }

    /// <summary>
    /// Performs an explicit conversion from <see cref="Color3"/> to <see cref="Color4"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static explicit operator Color4(Color3 value)
    {
        return new Color4(value.R, value.G, value.B);
    }

    /// <summary>
    /// Performs an explicit conversion from <see cref="Color3"/> to <see cref="Stride.Core.Mathematics.Vector3"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static explicit operator Vector3(Color3 value)
    {
        return new Vector3(value.R, value.G, value.B);
    }

    /// <summary>
    /// Performs an explicit conversion from <see cref="Stride.Core.Mathematics.Vector3"/> to <see cref="Color3"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static explicit operator Color3(Vector3 value)
    {
        return new Color3(value.X, value.Y, value.Z);
    }

    /// <summary>
    /// Performs an explicit conversion from <see cref="int"/> to <see cref="Color3"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static explicit operator Color3(int value)
    {
        return new Color3(value);
    }

    /// <summary>
    /// Convert this color to an equivalent <see cref="Color4"/> with an opaque alpha.
    /// </summary>
    /// <returns>An equivalent <see cref="Color4"/> with an opaque alpha.</returns>
    public readonly Color4 ToColor4()
    {
        return new Color4(R, G, B);
    }

    /// <summary>
    /// Returns a <see cref="string"/> that represents this instance.
    /// </summary>
    /// <returns>
    /// A <see cref="string"/> that represents this instance.
    /// </returns>
    public override readonly string ToString() => $"{this}";

    /// <summary>
    /// Returns a <see cref="string"/> that represents this instance.
    /// </summary>
    /// <param name="format">The format.</param>
    /// <param name="formatProvider">The format provider.</param>
    /// <returns>
    /// A <see cref="string"/> that represents this instance.
    /// </returns>
    public readonly string ToString([StringSyntax(StringSyntaxAttribute.NumericFormat)] string? format, IFormatProvider? formatProvider)
    {
        var handler = new DefaultInterpolatedStringHandler(8, 3, formatProvider);
        handler.AppendLiteral("R:");
        handler.AppendFormatted(R, format);
        handler.AppendLiteral(" G:");
        handler.AppendFormatted(G, format);
        handler.AppendLiteral(" B:");
        handler.AppendFormatted(B, format);
        return handler.ToStringAndClear();
    }

    bool ISpanFormattable.TryFormat(Span<char> destination, out int charsWritten, ReadOnlySpan<char> format, IFormatProvider? provider)
    {
        var format1 = format.Length > 0 ? format.ToString() : null;
        var handler = new MemoryExtensions.TryWriteInterpolatedStringHandler(8, 3, destination, provider, out _);
        handler.AppendLiteral("R:");
        handler.AppendFormatted(R, format1);
        handler.AppendLiteral(" G:");
        handler.AppendFormatted(G, format1);
        handler.AppendLiteral(" B:");
        handler.AppendFormatted(B, format1);
        return destination.TryWrite(ref handler, out charsWritten);
    }

    /// <summary>
    /// Returns a hash code for this instance.
    /// </summary>
    /// <returns>
    /// A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table.
    /// </returns>
    public override readonly int GetHashCode()
    {
        return HashCode.Combine(R, G, B);
    }

    /// <summary>
    /// Determines whether the specified <see cref="Color3"/> is equal to this instance.
    /// </summary>
    /// <param name="other">The <see cref="Color3"/> to compare with this instance.</param>
    /// <returns>
    /// <c>true</c> if the specified <see cref="Color3"/> is equal to this instance; otherwise, <c>false</c>.
    /// </returns>
    public readonly bool Equals(Color3 other)
    {
        return R == other.R && G == other.G && B == other.B;
    }

    /// <summary>
    /// Determines whether the specified <see cref="object"/> is equal to this instance.
    /// </summary>
    /// <param name="value">The <see cref="object"/> to compare with this instance.</param>
    /// <returns>
    /// <c>true</c> if the specified <see cref="object"/> is equal to this instance; otherwise, <c>false</c>.
    /// </returns>
    public override bool Equals(object? value)
    {
        return value is Color3 color && Equals(color);
    }

    /// <summary>
    /// Deconstructs the vector's components into named variables.
    /// </summary>
    /// <param name="r">The R component</param>
    /// <param name="g">The G component</param>
    /// <param name="b">The B component</param>
    public readonly void Deconstruct(out float r, out float g, out float b)
    {
        r = R;
        g = G;
        b = B;
    }

#if SlimDX1xInterop
    /// <summary>
    /// Performs an implicit conversion from <see cref="Stride.Core.Mathematics.Color3"/> to <see cref="SlimDX.Color3"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static implicit operator SlimDX.Color3(Color3 value)
    {
        return new SlimDX.Color3(value.Red, value.Green, value.Blue);
    }

    /// <summary>
    /// Performs an implicit conversion from <see cref="SlimDX.Color3"/> to <see cref="Stride.Core.Mathematics.Color3"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static implicit operator Color3(SlimDX.Color3 value)
    {
        return new Color3(value.Red, value.Green, value.Blue);
    }
#endif

#if WPFInterop
    /// <summary>
    /// Performs an explicit conversion from <see cref="Stride.Core.Mathematics.Color3"/> to <see cref="System.Windows.Media.Color"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static explicit operator System.Windows.Media.Color(Color3 value)
    {
        return new System.Windows.Media.Color()
        {
            A = 255,
            R = (byte)(255f * value.Red),
            G = (byte)(255f * value.Green),
            B = (byte)(255f * value.Blue)
        };
    }

    /// <summary>
    /// Performs an explicit conversion from <see cref="System.Windows.Media.Color"/> to <see cref="Stride.Core.Mathematics.Color3"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static explicit operator Color3(System.Windows.Media.Color value)
    {
        return new Color3()
        {
            Red = (float)value.R / 255f,
            Green = (float)value.G / 255f,
            Blue = (float)value.B / 255f
        };
    }
#endif

#if WinFormsInterop
    /// <summary>
    /// Performs an explicit conversion from <see cref="Stride.Core.Mathematics.Color3"/> to <see cref="System.Drawing.Color"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static implicit operator System.Drawing.Color(Color3 value)
    {
        return System.Drawing.Color.FromArgb(
            (byte)(255f * value.Red),
            (byte)(255f * value.Green),
            (byte)(255f * value.Blue));
    }

    /// <summary>
    /// Performs an explicit conversion from <see cref="System.Drawing.Color"/> to <see cref="Stride.Core.Mathematics.Color3"/>.
    /// </summary>
    /// <param name="value">The value.</param>
    /// <returns>The result of the conversion.</returns>
    public static implicit operator Color3(System.Drawing.Color value)
    {
        return new Color3()
        {
            Red = (float)value.R / 255f,
            Green = (float)value.G / 255f,
            Blue = (float)value.B / 255f
        };
    }
#endif
}
